What are the reasons that have led to a lack of affordable housing, and can it be resolved?

T‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌his is a capstone research paper on the listed topic. My timeline is introduction paragraph with thesis and pages 1-5 due by April 15th, pages 6-10 are due by April 22n‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌d with final project to include annotated bibliography of min. 10 sources due on May 2nd. I have a completed Prospectus and 5 annotated bibliography sources to referenc‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌e